In April 2025, Ben Kampmann contributed to the matrix-org/matrix-rust-sdk by addressing a bug in the event processing logic that previously allowed room state events to be overwritten during state_event handling. Using Rust and focusing on state management within SDK development, Ben implemented a targeted fix that preserves previously added state events, ensuring consistent room state synchronization across clients. The solution included a regression test to verify correct behavior, reducing the risk of inconsistent state and improving overall SDK reliability. The work demonstrated careful attention to maintainability and scope, resulting in clearer, more robust code for downstream users of the SDK.